🛑 How to Stop Spotted Lanternflies in Pennsylvania (2025 Guide)
đź“Ť Pennsylvania Remains Ground Zero for Lanternfly Infestations
Pennsylvania was the first U.S. state to detect the spotted lanternfly (Lycorma delicatula) in 2014—and by 2025, it remains the epicenter of infestations, especially in counties like Berks, Bucks, Montgomery, and Lancaster.
The state’s agricultural output—especially grapes, hops, apples, and hardwoods—remains under threat from this destructive pest.
âť— The 4-Step Plan to Stop Lanternflies in Pennsylvania
âś… 1. Kill Every Lanternfly You See
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Adults are most visible in July–October. They won’t bite or sting—just stomp or swat.
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If you see one inside your house, trap and freeze it, then report it.
âś… 2. Scrape and Destroy Egg Masses
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Egg masses resemble gray mud or crusty splotches.
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Found on: trees, stone, outdoor furniture, fence posts, car tires.
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Scrape into a container with rubbing alcohol or hand sanitizer.
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Best time: October through April, before hatch.
âś… 3. Use a Vertical Tree Trap
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Place traps on trees near your home, barn, or garden, especially if you’ve seen nymphs or adults nearby.
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Use a wildlife-safe trap like the FOBA ring trap, which avoids harming birds and pollinators.
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DO NOT use glue wraps directly on fruit trees or vines without mesh covering.
âś… 4. Remove Tree of Heaven (Ailanthus altissima)
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This invasive tree is the SLF’s favorite host and egg-laying location.
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Identify it by its smooth gray bark, compound leaves, and peanut butter smell when crushed.
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Cut down female trees and treat stumps with Triclopyr or Imazapyr.
đź“… 2025 Seasonal Timeline (PA-Specific)
| Stage | Timeframe |
|---|---|
| Egg Hatch Begins | April–May |
| Nymph Stage | May–July |
| Adults Appear | July–October |
| Egg Laying Season | August–November |
As of August 2025, Pennsylvania is deep into adult stage and egg laying—now is the time to act.
🔎 Frequently Asked Questions (PA Edition)
Q: Are lanternflies more active in rural or urban areas in PA?
A: Both. They’ve been found in city parks, train yards, vineyards, and backyard gardens across eastern and central PA.
Q: Are FOBA traps approved in PA?
A: Yes. FOBA traps follow Penn State's guidelines for safe vertical trapping that avoids bird harm when properly installed.
Q: Should I report sightings even if it’s just one insect?
A: Absolutely. Every sighting helps map the infestation and guide containment efforts. Report to extension.psu.edu/spotted-lanternfly.
📣 Don’t Wait for Damage—Stop It Now
Lanternflies don’t just harm plants—they impact:
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Wineries and orchards via lost crop yields
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Homeowners via sticky honeydew and black mold
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Forests and landscapes via sap depletion
If you live in Pennsylvania, your vigilance this summer will directly affect next year’s outbreak.
Step. Scrape. Trap. Report.